Integral window drilling tool

A window-opening sidetracking and integrated technology is applied in the field of oil drilling to achieve the effects of reducing milling, cost and tension.

Active Publication Date: 2017-07-14
BC P INC CHINA NAT PETROLEUM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The purpose of this invention is to overcome the problems of existing mechanical and hydraulic window opening tools, and provide an integrated sidetracking tool for window opening, which adopts mechanical setting seal method, its structure is simple, and the window opening and window repairing operations can be completed in one trip, and there is no risk of mis-setting.

Method used

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0032] In order to overcome the problems of existing mechanical and hydraulic window tools, this embodiment provides a Figure 1 to Figure 4 The integrated fenestration sidetracking tool shown in the figure includes three parts: a fenestration sidetracking unit, a slip anchoring unit, and a friction steering unit connected sequentially from top to bottom;

[0033] The window sidetracking unit includes a milling cone 1 and a bevel 3, and the lower part of the milling cone 1 is connected to the upper part of the bevel 3 through a shear nail 2;

[0034] The slip anchoring unit includes a central shaft 6 inside and a slip 8 and a jacket 14 outside the upper part of the central shaft 6. The outer side of the slip 8 is provided with teeth, and the upper and lower ends of the slip 8 are respectively connected to the upper slips. Seat 5 and lower slip seat 9, the outer side of the upper slip seat 5 is provided with an inclined chute 5.1, the upper end of the slip 8 is nested in the in...

Embodiment 2

[0043] On the basis of Embodiment 1, this embodiment provides an integrated sidetracking tool for opening windows. In order to facilitate the lowering of the tool, a guide cone 21 is provided outside the lower end of the central shaft 6 .

[0044] The milling cone 1 has a two-stage structure, the middle part is a window repairing part 1.1, and the lower end is a window opening part 1.2. The two-stage milling cone can complete the window opening and repairing operation in one pass, and after the shear nails are cut off, the milling cone can directly act on the casing wall, reducing the milling of the milling cone on the guide bevel, shortening the milling time and reducing the It reduces the cost and helps to improve the window opening efficiency.

Embodiment 3

[0046] On the basis of Embodiment 2, this embodiment provides an integrated sidetracking tool for opening windows. The angle of the inclined surface of the leading inclined body 3 is 2-3°, and the upper part of the inclined surface of the leading inclined body 3 is provided with an inner cylindrical boss. 3.2, the shear nail 2 passes through the shear nail hole on the inner cylindrical boss 3.2 and is tightened with the threaded hole on the milling cone 1 . Ensure that the inner cylindrical surface of the inner cylindrical surface boss 3.2 is in close contact with the outer cylindrical surface of the milling cone 1. This design not only enhances the strength around the shear nail hole, but also reduces the tension on the shear nail 2. At the same time, it effectively makes the milling cone 1 acts directly on the casing wall, reducing the milling of the milling cone 1 for the guide bevel 3.

[0047] A salvage hole 3.1 is provided on the middle and upper part of the inclined sur...

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Abstract

The invention provides an integral window drilling tool. The integral window drilling tool comprises a window sidetrack drilling unit, a tile clamping anchoring unit and a friction direction changing unit connected in order from top to bottom. The integral window drilling tool adopts a mechanical seat sealing principle by rotating and pushing, and is simple in structure, simple in operation, reliable in performance, high in efficiency, and capable of completing the constructions of drilling tool downward entering, direction settling, seat sealing, window opening, window fixing and the like in one time drilling; axial direction compression resistance and circumferential torsion resistance are realized through a set of clamping tile, and the direction changing groove design of the mechanical anchoring mechanism can effectively prevent a mistake of seat sealing caused by lifting a drill stem excessively during the process of drilling down and up and increase the stability of tile clamping anchoring.

Description

technical field [0001] The invention relates to the technical field of petroleum drilling, in particular to an integrated window sidetracking tool. Background technique [0002] At present, the sidetracking tools used in the sidetracking of old wells can be divided into hydraulic type and mechanical type. The hydraulic window opening tool requires two drills to complete the window opening operation. Its structure is complex and the operation is cumbersome. Two sets of slips are driven by independent hydraulic cylinders, one set is anti-rotation and the other set is anti-axial pressure. When in use, a special hydraulic pipeline is required to lead to the hydraulic cylinder at the bottom of the well to drive the slips in the circumferential and axial directions. Setting: A mechanical window opening tool currently in use adopts a setting mechanism with long and short slots reversing, which may cause the risk of missetting when lifting the drill string, resulting in damage to t...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E21B29/06
CPCE21B29/06
Inventor 胡东锋韦海防王思凡李前春王玉王培峰陈炼军刘立鹏杜松涛段成才安全成
Owner BC P INC CHINA NAT PETROLEUM CORP
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